Pumping system



Dec. 5, 1939. Q JJASBERG 2,181,973

PUMPING SYSTEM Filed April 23, 1958 5 Sheets-Sheet l 0. d. JasaenqINVENTOR ATTORNEY 0 J. JASBVERG PUMPING SYSTEM Dec. 5, 1939.

Filed April 23, 1958 3 Sheets-Sheet 2 O. J. Jaseeac,

l VENTOR ATTORNEY Dec. 5, 1939. I O J, JASBERG 2,181,973

PUMPING SYSTEM Filed April 25, 1938 3 Sheets-Sheet 3 4' O. J. Jassem;

EN R

ATTORNEY Patented Dec. 5, 1939 UNITE STATEfi ATENT GEFFIQE PUNEPINGSYSTEM Onni J. Jasberg, Kellogg, Idaho Application April 23, 1938,Serial No. 203,731

1 Claim.

This invention relates to pumping systems such as those employed in thecopper, zinc, and other similar mining industries, for circulation ofdilute sulphuric acid or other acids, in leaching or electrolytic tanks.

Heretofore pumps of the type known to the trade as bootleg pumps,because of the long boot which forms the suction chamber, have beenemployed in such service, in connection with a level control tankinterposed between the main collecting tank and the pump. While suchpump constructions and systems have in the main been successful .1operation, they are costly both as first cost and as to maintenance,partly due to the inaccessibility of and the difficulty in dismantlingthe pump boot to gain access to the pump impeller and casing for repairsthereto or for releading.

An object of the present invention is to provide a pumping system andstructure for use in install ions of the above or analogous type whichwill reduce both the initial or manufacturing costs, and the maintenancecosts of the pumping structure and which will eliminate theinaccessibility and difficulty of dismantling and re-assemb ng the pump.

1" specifically, the present invention comprises the provision of apumping unit or structure of this type wherein the pump casing isattached directly to the bottom of the level control tank so that a partof this tank will act as the suction boot of the pump. A suitable shaftis provided which carries the pump impeller and is connected by asuitable coupling to the motor driven shaft in such manner that theimpeller unit may be withdrawn with comparative ease through a suitableopening in the tank.- The tank also is large enough to admit a mechanicor mechanics, so that the interior of the pump casing may be re-leadedor repaired without disturbany of the piping connections thereto.

With these and other objects in view, as may appear from theaccompanying specification, the invention consists of various featuresof construction and combination of parts, which will described inconnection with the accompanying drawings, showing a pumping systemembodying the invention, and the features forming the invention will bespecifically pointed out in the claim.

In drawings:

Figure 1 is side elevation of the improved piping s Vructure.

Figure 2 is a vertical section through the pump proper and a part of thelevel control tank,

Figure 3 is a plan view taken on the line 3-3 of Figure 1.

' Figure 4 is a detailed section taken on the line 44 of Figure 2.

Figure 5' is a detailed section taken on the line 55-of Figure 1.

Figure 6 is a detailed section taken on the,line 6-43 of Figure 3.

Figure -7 is a section through a part of the level control tank and thepump casing illusl0 trating the manner of removal of the pump impellerunit.

Referring more particularly to the drawings, the improved pumping systemincludes the pump structure l, the casing 2 of which is attached in anysuitable manner to the outer surface of the bottom 3 of the levelcontrol tank 4', with the side of the casing open to the interior of thetank, as clearly shown in Figure 2 of the drawings. The pump impeller 4is carried by a suitable shaft 5 which extends downwardly through thelevel control tank i. The upper end of the suitable shaft 5 extends outof the top of the control tank 4 through a suitable opening in theremovable cover 6, and it is connected to the motor driven shaft l by acoupling 8. In the drawings a particular type of coupling 8 is shown,having one of the coupling flanges, namelythe flange 9, formed upon theshaft 1, while the coupling flange H3 is detachably connected to theupper end of the suitable shaft 5. However it is to be understood thatany suitable type of coupling may be employed which will providepositive steady connection between the shafts 5 and l, and permitdisconnection of these shafts for the removal of the impeller unit, aswill be hereinafter more fully described. The pump structure l, shown inthe drawings, is lined with a suitable acid resistant, such as lead andantimony, however, if it is so desired, the pump parts may beconstructed of a suitable acid resisting material, instead of lining orcoating the pump parts as shown in the drawings. The shaft 5 is alsocoated with a coating of acid resistant, as shown at H.

Owing to the fact that it is necessary to repair the impeller l and theinterior of the casing Z of the pump, a pump structure is provided whichwill facilitate the removal of the impeller without completelydismantling the pump and without disrupting the connections of thecasing with the level control tank 4, and with piping (not shown) whichmay be connected to the discharge flange it of the pump. The suctionside of the casing 2 which opens into the level control tank has itssides tapering outwardly as they eX- 5 tend towards the bottom 3 of thetank 4', as clearly shown at I4 in Figure 2 of the drawings. A removablemember I5 is provided which fits in the tapered portion of the pumpcasing and 5 cooperates with the pump casing 2 and the impeller 4 toform the proper passages in the pump and provide a suction opening oreye l6 for the pump, which opens directly into the tank 4.

The member I5 is held in place by suitable rods l l, which have theirlower ends detachably connected to the removable member I5 and extendingupwardly through the tank 4 and into suitable sockets l8 formed in theremovable covering 6. Set screws l9 are carried by suitable blocks 20,which latter are preferably welded to the cover 6. The set screws l9engage the upper ends of the rods l1 and clamp against them for securelyholding them and the removable member IS in place.

When it is desired to remove the impeller element, comprising theimpeller 4, removable member l 5, shaft 5, and rods H, for repair orre-lead ing of the impeller and pump parts, the slide 22 which forms apart of and is slideably carried by 25 the cover 6 is moved outwardly,the set screws [9 are loosened, the cover member 6 is lifted slightly sothat it will clear the upper ends of the rods I1, and the cover is thenmoved into open position as shown in Figure 7 of the drawings. The

coupling 8 is then disconnected and by slightly tilting, the tiltinggradually increasing as, the member l5 and'impeller 4 are raised, theentire removable element of the pump structure may be easily taken outof the tank 4' for repair. This 5 leaves the pump casing 2 open to theinterior of the tank 4', as clearly shown in Figure 7 of the drawings,so that a mechanic or mechanics may enter the tank 4' through theopening in the top and repair the interior of the pump casing withoutremoving it or detaching it from the tank 4' or any piping connectionsthereto.

As hereinbefore pointed out, one end of the level control tank 4' formsthe boot or suction chamber for the pump I, eliminating the need of theboot such as has been previously employed to provide the suction chamberfor pumps of this type.

The level control tank 4' is connected to the main collecting tank 26through a suitable supply pipe 21, and a float controlled valvestructure 28 of any suitable type is placed in the piping 21 forcontrolling the flow of fluid into the level controlling tank 4'. Thefloat 29, which controls the liquid level in the tank 4', is placed inthe tank as shown in dotted lines in Figure 1 of the drawings.

The driving motor 30 is supported above the collecting tank 4' onsuitable supporting structure indicated at 3| and shims, as indicated at32 v in Figure 2 of the drawings, may be used for raising the motorstructure slightly to permit sulficient separation of the elements 9 andll] of the coupling 8 to allow the initial movement of the shaft 7,impeller 4, and removable member [5, to allow the removal of thesemembers when desired.

It will be understood that the invention is not to be limited to thespecific construction or arrangement of parts shown but that they may bewidely modified within the invention defined by the claim.

What is claimed is:

In a pumping structure, in combination, a level control tank, a pumpincluding a casing embodying an impeller chamber and having its suctionside open and attached to said tank whereby the tank will act as asuction chamber for the pump, an impeller in said casing, a removablemember forming the suction side of the impeller chamber and passages ofthe pump, a

shaft connected to said impeller, a prime mover,

and removable member and impeller shaft maybe removed from the casingand tank as a unit.

ONNI J. JASBERG.

